Spatially inhomogeneous thermo field dynamics

K. Nakamura*, H. Umezawa, Y. Yamanaka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Non-equilibrium thermo field dynamics is extended to treat spatially inhomogeneous systems. A canonical formalism of thermally dissipative semi-free fields describing spatially inhomogeneous situations is presented. With this formalism, a scheme of perturbative calculations is developed and the "on-shell" renormalization condition is discussed. We illustrate this scheme using a model of particles interacting with impurities and find that the self-consistent renormalization condition gives the kinetic equation for the averaged particle number density as well as the renormalized energy and the dissipative coefficient. It is also shown that this kinetic equation can be reduced to the Boltzmann equation in the gradient expansion approximation.

Original languageEnglish
Pages (from-to)118-136
Number of pages19
JournalPhysica A: Statistical Mechanics and its Applications
Issue number1
Publication statusPublished - 1988 May
Externally publishedYes

ASJC Scopus subject areas

  • Statistics and Probability
  • Condensed Matter Physics


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